DTK COMPUTER, INC.
==================

   PTM-1230C

   Processor                80286                                 
   Processor Speed          12MHz                                 
   Chip Set                 VLSI/VTI                              
   Max. Onboard DRAM        1MB                                   
   Cache                    None                                  
   BIOS                     DTK                                   
   Dimensions               341.6mm x 204.2mm                     
   I/O Options              Parallel port, serial ports (2)       
   NPU Options              80287                                 

<gopher://bitreich.org/I/th99/m/C-D/30007-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |      Purpose      | Location |     Purpose      | Location |
   |-------------------+----------+------------------+----------|
   | Power LED &       |    J1    | External battery |   J12    |
   | keylock           |          |                  |          |
   |-------------------+----------+------------------+----------|
   | Reset switch      |    J2    | Serial port      |   CN1    |
   |                   |          | (COM2)           |          |
   |-------------------+----------+------------------+----------|
   | Speaker           |    J3    | Serial port      |   CN2    |
   |                   |          | (COM1)           |          |
   |-------------------+----------+------------------+----------|
   | Turbo LED         |    J4    | Parallel port    |   CN3    |
   |-------------------+----------+------------------+----------|
   | Turbo switch      |    J5    |                  |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Function                | Jumper | Position |
   |----------------------------------------+--------+----------|
   |>> | DRAM speed select 0 wait states    |   J6   |  Closed  |
   |---+------------------------------------+--------+----------|
   |   | DRAM speed select 1 wait state     |   J6   |   Open   |
   |---+------------------------------------+--------+----------|
   |>> | Factory configured - do not alter  |   J7   | Unknown  |
   |---+------------------------------------+--------+----------|
   |>> | Factory configured - do not alter  |  J10   |   N/A    |
   |---+------------------------------------+--------+----------|
   |>> | Monitor type select color          |  J11   |  Closed  |
   |---+------------------------------------+--------+----------|
   |   | Monitor type select monochrome     |  J11   |   Open   |
   |---+------------------------------------+--------+----------|
   |>> | BIOS type select 27256             |  J22   |  Closed  |
   |---+------------------------------------+--------+----------|
   |   | BIOS type select 27128             |  J22   |   Open   |
   |---+------------------------------------+--------+----------|
   |>> | CMOS memory normal operation       |  JP1   |  Closed  |
   |---+------------------------------------+--------+----------|
   |   | CMOS memory clear                  |  JP1   |   Open   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |      512KB       |     (18) 41256     |        NONE        |
   |------------------+--------------------+--------------------|
   |      640KB       |     (18) 41256     |     (18) 4164      |
   |------------------+--------------------+--------------------|
   |       1MB        |     (18) 41256     |     (18) 41256     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM JUMPER CONFIGURATION                  |
   |------------------------------------------------------------|
   |       Size        |         J8         |        J9         |
   |-------------------+--------------------+-------------------|
   |       512KB       |       Closed       |      Closed       |
   |-------------------+--------------------+-------------------|
   |       640KB       |       Closed       |       Open        |
   |-------------------+--------------------+-------------------|
   |        1MB        |        Open        |      Closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             PARALLEL PORT (CN3) CONFIGURATION              |
   |------------------------------------------------------------|
   |     Port     |    J13     |    J14     |        J19        |
   |--------------+------------+------------+-------------------|
   |     LPT1     |   Closed   |   Closed   | pins 1 & 2 closed |
   |--------------+------------+------------+-------------------|
   |     LPT2     |    Open    |    Open    | pins 2 & 3 closed |
   |--------------+------------+------------+-------------------|
   |   Disabled   |    Open    |   Closed   |        N/A        |
   |--------------+------------+------------+-------------------|
   |   Disabled   |   Closed   |    Open    |        N/A        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SERIAL PORT CONFIGURATION                  |
   |------------------------------------------------------------|
   |   Serial   |  J15   |  J16   |  Serial   |  J17   |  J18   |
   |   Port 1   |        |        |  Port 2   |        |        |
   |   (CN2)    |        |        |   (CN1)   |        |        |
   |------------+--------+--------+-----------+--------+--------|
   |    COM1    | Closed | Closed |   COM2    | Closed | Closed |
   |------------+--------+--------+-----------+--------+--------|
   |    COM3    |  Open  |  Open  |   COM4    |  Open  |  Open  |
   |------------+--------+--------+-----------+--------+--------|
   |  Disabled  | Closed |  Open  | Disabled  | Closed |  Open  |
   |------------+--------+--------+-----------+--------+--------|
   |  Disabled  |  Open  | Closed | Disabled  |  Open  | Closed |
   +------------------------------------------------------------+